It happens fast. One Tuesday evening, someone shifts the TV to reduce glare, feels a slight give in the mount, and by Thursday, the whole thing is leaning two inches out from the wall. By the following weekend, three hundred pounds of combined TV and mount are on the floor.
This is not a freak accident. It happens regularly — and in the vast majority of cases, the mount itself is fine. The problem was always behind the wall.
Drywall Was Never Designed to Hold a TV
Standard half-inch drywall can handle about five to ten pounds of pull-out force per anchor under ideal conditions. A 65-inch TV plus a full-motion mount can weigh sixty to ninety pounds and generate significant lateral force every time someone adjusts the angle. The math was always unfavourable.
The correct approach is to hit studs — the vertical timber or steel framing members inside your wall. Studs are typically spaced sixteen inches apart in Canadian residential construction, which means a proper TV mount installation starts with finding them accurately, not approximately.
A cheap stud finder from a hardware store has a meaningful error rate, especially near electrical boxes, pipes, or engineered lumber. Professional installers use higher-grade sensors and often verify with a small probe before committing.
The Anchor Problem
When studs are not where you need them — which happens often with odd-sized TVs or specific placement requests — installers use wall anchors. Not all anchors are equivalent. Toggle bolts rated for fifty pounds behave differently from snap-in plastic anchors rated for ten. Using the wrong anchor for the weight class of your TV is the single most common cause of a delayed failure.
Delayed, because the mount holds fine at first. The anchor is seated, the TV goes up, and everyone is satisfied. Then vibration from a soundbar, a child pulling on the TV, or simply thermal expansion over a Canadian winter works the anchor loose incrementally. The failure feels sudden. It was not.
The Conceal-and-Forget Error
Another recurring issue is the cord management decision. Some homeowners run cables through the wall before the mount is properly stress-tested. When something needs to be redone, opening the wall costs more than the original job. Cables should follow the mount, not precede it.
What a Professional Installer Actually Does
A trained technician confirms stud location and material, checks for live wires or pipes in the planned drill path, selects mounting hardware rated above the TV’s weight class (not equal to it), and tests the mount at multiple angles before the TV goes on. It takes longer than a DIY job. That is the point.
In Sudbury, North Bay, Timmins, and the other communities Avensa serves, wall construction varies — from post-war plaster and lathe to modern drywall over steel stud, to older brick-cavity constructions. What works in one house will not necessarily work in the next.
If your TV is already mounted, a simple check is worth doing: grab the sides of the TV (not the screen) and apply gentle sideways pressure. You should feel nothing. If you feel any give, movement, or hear a creak from behind the wall, get it looked at before it becomes an insurance claim.
The mount probably did not fail. Something behind it did — and that something was always the variable that mattered.